Compressor



G. F. KRIEGER; COMPRESSOR.

1,365,506. APPLICATION FILED .AN.20, I920. Jan 11 4 SHEETS-SHEET I.

WITNESSES I 4 A TTOENEIS G. F. KRIEGER.

COMPRESSOR.

APPLICATION FILED 1AN.20, 1920.

Patented Jan. 11, 1921.

4 SHETSSHEET 2.

INVE/VTUR 5W4 ATTORNEYS G. F. KRIEGER.

COMPRESSOR.

APPLICATION FILED JAN-20, 1920.

Patented Jam-l1, 1921.

4 SHEETS-SHEET 4.

PATENT OFFICE.

GEoEGE F. KRIEGER, 0E GRAND RAPIDS, WISCONSIN.

COMPRESSOR.

Specification of Letters Patent. I Pate t d J 11 192 Application filed January 20, 1920. Serial No. 352,646.

To all to hom it may concern:

Be it known that I, GEORGE F Knmcnn, a citizen of the United States, and a resident of Grand Rapids; in the county of lVood and State of Visconsin, have invented a new and Improved Compressor, of which the following is a full, clear, and exact description.

I This invention relates to .compressors'such as are used in refrigerating machinery, as

for the transformation of a refrigerating mediumfrom gas into a liquid.

Among the objects of the invention is to providea machine of the, character indicated which is adapted for unusual high speeds.

Another object of the invention is to provide a novel construction of reciprocating piston structure having an active piston head at each end while the body or stem of-the piston intermediate of the heads is provided with a longitudinal borer through which gas may be admitted from, a reservoir and passed laterally-outward through a pluralityof ports, and thence through the piston head past a valve and-fitted movably in the piston head.

Another object of the invention is to improve the piston construction in the provision ofan oscillating segmentmeshingwith rack. teeth formed inthe pistonrod, there being 1 provided ports directly through the wallof the piston rod between adjacent rack teeth. to facilitate the passage of the. gas from the reservoir inview of'the high speed of action ofv the machine Another obj ect-of the: invention is to provide iniproved;valvedevices and packing glands for high speed compressingmachinery of thenature set forthherein.

With- ,the foregoing and other objects in view the invention consists in the'arrangement and combination o:t -parts-hereinafter described and claimed, and while the inventionis not restricted toithe exact details of construction disclosed or suggested herein, still for the purpose of illustrating a practical embodiment thereof reference is had to the accompanying drawings, in which like reference characters designate the same parts in the several views, and in which- Figure 1 is mainly a right side elevation of my improved machine with parts in section on the broken line 1-1of Fig. 3.-

Fig. 2 is a vertical transverse section on the line 2-2 of Fig. 3; r

Fig. 3 is a vertical section on the line Fig. 4 is a view similar, to 2 of the principal parts of the machine, but with the piston mechanism in changed position.

Figs. 5 and 6 are, vertical transverse .details on the corresponding lines of,Fig,,4

F 1g. 7 is avertical transverse section on the line-7-7 of Fig, 2. j

Referring now,more specifically to r the draw ngs I show a compressor comprising a baselO having any suitabledesigner construction of standards 11 and 12s in the upper ends of which are journale'd, the power shaft 13 having ,a crank let, the shaft being adaptedto be rotated at high speed by any suitable means typified by a pulley orfly wheel15. v v Disposed at one side of the vertical plane .of the crank shaft '13 are rigid supports16 and 17 fixed as rigid or: integral partsof the base 10,t he 1atter supporting ran-casing 18 having a face plate 18 detachably secured thereto as by means ofjlag-screws19 andcconstitutinga reservoir 20 for the gas to be compressed and in which certainoperative parts are housed. The main-portion of, this casinglli has a closedextensionor hub 21 constituting abearing for thejnner endofc av rock shaft 22 whoseotherend is j ournaled' in the .npper portion; of theisupport 16, An intermediateportion ofthe rockshaft 22 is journaled in a stufiingbox comprising a cap 23 having screw-,Ihreads cooperating with the exterior threads on the hub CXtQDSlOIIQft of the faceplate 18", while the cap within the extension 24 has smooth ontact, wi h h interior sur ace. of said extension and'adapted to abut against any suitable packing, V material :25 adapted to make a gas-and oil tight ,bearing between theserelatively; movable parts. As will, be noted from Figs. 2. and 3 thereservoir.v 2O is extended well around and beneath the rock shaft forming apit 26' adapted toreceive and-collect'any deposition of solid matter Secured by any suitable means uponthe rock shaft between the supports 16; and 17 is alever 27 which extends upward at any suitable angle with respect to the vertical plane of the rock shaft and has connection withthe crank 14 through a connecting rod 28 and a knuckle 29 pivoted at 30 to the connecting rod and having adjustable connection at 31 with the upper end of the lever so as to vary the arc of rotation of the rock shaft.

Formed upon or carried by the upper portion of the casing 18 is a horizontally extending cylinder 32 having a substantially smooth cylindrical bore 33 from one end to the other, but cut away or provided with an opening at the middle portion of its bottom at 34 for the accommodation of a segmental rack 35 connected to a wing 36. The preferred manner of connecting the segment 35 to the wing is shown best in Figs. 2 and 3 and comprises overlapping portions having strong binding screws 37 connecting them, but with the provision of adjustment wedges 38 disposed between the upper end of the wing and the main portion of the segment which are adjustable endwise by means of screws 39 operating through fixed studs 40 whereby the segment is adjustable upward or outward with respect to the rock shaft when the screws 37 are loose enough. A plate 41 connected to the side of the segment by means of a screw 42 serves to hold the wedges in place. After adjustment the screws 37 are tightened to make the adjustment positive and permanent. It will be understood that the wing 36 and segment carried thereby oscillate freely in the reservoir 20, there being ample room not only for these parts but for the transmission of the gas therethrough.

The gas to be compressed is received through an inlet pipe 43 which communicates with the reservoir 20 through an enlargement 44 in the form of a cylinder whose purpose is to provide a sufficient volume of gas to insure an ample supply to the compressor cylinderwithout materially lowering the pressure in the supply pipe 43 at the time of the suction stroke of the piston. Said supply cylinder leads into the rear portion of the casing 18 or reservoir 20 through a horizontal neck connection 45 (see Fig. 7) connected to the casing by means of a coupling 46 having a packed joint at 47.

The piston is shown at 48 and comprises a central portion or rod having a longitudinal bore 49. At each end there is constituted a piston 50 between which andthe central or main portion of the rod is formed an annular channel 51 into which oppositely disposed lateral ports 52 lead from the central bore 49. From the channel 51 a plurality of ports 51 lead to a pocket 53 adjacent to the valve seat 54 in the center of the end of the piston against which a valve 55 coiiperates. The valve stem 56 reciprocates endwise through a central hole and is normally held seated by means of aspring 57. The bottom portion of the middle of -and gear segment 35.

the piston is provided with rack teeth 58 which mesh with the teeth of the segment 35, and between adjacent teeth 58 are provided ports 59 leading directly from the mouth 34 of the cylinder to the central bore 49 of the piston whence the gas is adapted to pass freely through the lateral ports 52 channel 51 and ports 51' as above set forth.

The rotation of the power or crank shaft 13 at any desired speed causes through the connecting means 28 and 29 an oscillation of the lever 27 and rock shaft 22, and c'onsequently the oscillation of the rock shaft causes a similar movement of the wing 36 Since the curvature of the segment corresponds to the axis of the rock shaft the segment causes a reciprocation of the entire piston to and fro in the cylinder 32, Fig. 2 shows the mid position of the piston'and Fig. 4 shows the position of the piston when it is approaching the extreme movement toward the right.

Since the piston is of the double acting construction I provide two delivery pipes 60 leading from the respective ends thereof but which merge into one delivery pipe 61 beyond the cylinder. In order to effect the desired degree of compression and to properly control the direction of movement of the fluid being made into liquid, I provide a peculiar valve structure at each end of the cylinder or between the cylinder and the outlet pipe 60 adjacent thereto. Such valve structure includes a valve seat 62 in the nature of a disk clamped between the end of the cylinder and a valve body 63 with suitably packed joints, said disk having a central port 64 therein for cooperation with. a valve 65 normally seated by means of a strong spring 66 acting at its other end against the body 63 outside of the disk 62.

Said body is suitably cored to provide a lateral passageway 67 communicating with the pipe60. hen the valve 65 is approached by the piston 50 on the compression stroke the gases trapped within the cylinder and compressed at such time will cause the opening of the valve 65 against the spring 66 whereby the compressed fluid is forced out through the body and pipe 60. While the piston at one end is making a compression stroke the one at the other end is making a suction stroke and a charge of gas is being transferred through the ports 59, port 49, ports 52, 51 and 51 into the then receiving cylinder unseating the valve 55 as shown at the left end of Fig. 4. At this time the valve- 65 adjacent to the suction end of the piston is closed. The chamber '20 is presumed to be maintained-at all times filled with gas but at a relatively low pressure. In order therefore to insure the prompt transfer of the gas at low pressure from the chamber 20 into the cylinder I provide an additional port 68 leading from the chamber 20 through the Wall of the cylinder and communicating with the cylinder space at a point beyond the piston at the time it is about completing its suction stroke. It Will thus be seen that a charge of gas will be transferred through this auxiliary port 68 supplemental to the charge that passes through the piston.

I claim:

1. In a compressor, the combination of a cylinder having a lateral opening, a piston structure reciprocating in the cylinder and including a rod having a longitudinal central bore, the piston rod being provided near one end with an annular channel and having lateral ports leading from the bore to said channel, means being provided to transfer a fluid through the lateral opening of the cylinder into the piston rod bore and thence through the lateral ports to the annular channel, and means to transfer the fluid from the annular channel through the center of the piston.

2. In a compressor, the combination of a cylinder having a lateral central opening and a piston structure reciprocating in the cylinder and including a rod having a central bore and a piston at each end of the rod, the pistons being on opposite sides of said lateral opening, the piston rod being provided adjacent to each piston With an annular channel and lateral ports leading from the bore to the channel and also being provided with a plurality of longitudinal ports leading from the annular channel outward through the piston, and a valve carried by each piston at the outer ends of said plurality of ports, there being provided in the end of the piston a valve seat and a pocket into which said plurality of ports extend.

GEORGE F. KRIEGER. 

